Nut lock



I 1,627,404 May 3, 1 M. OUTHIER NUT LOCK Filed June 19. 1925 PatentedMay 3, 1927.

UNITED STATES PATENT J MARGEL OUTHIER, 0F PARIS, FBQANCE, ASSIGNOB T0SOCIETE ANONY LIE DES ETABLISSEHENTS xmnompor LEVALLOIS-PERRET, FRANCE.

. Ppncation filed June 19, 1925, Serial No. 38,242, an d in -FranceApril 4, 1925,,

The invention relates to a releasing device for nut locks of the kind inwhich the automatic locking action is obtained by means of a ball which,under the action of a spring, is jammed between the wall of its seat andthe to or' the sides of the thread of the bolt of the nut screwed on thebolt spindle, but

unlocked.

' Fig. 3 is a plan view of the nut without looking or unlocking device.

' 5 Fig. 4 is a view of the unlocking device.

Fig. 5 is a section on line ab of Fig. 4. Fig. 6 is a section on linec dof 2. Fig. 7 is a section on line 'e--f of Flg. 3. The nut 1 is providedtangentially to the threads of the bolt spindle 2 with a channel 3 inwhich are located the locking ball 4 and its spring 5 and a push bar 6.

If the nut 1, the members of which are in the position shown in Fig. 1,is turned in the direction indicated by the arrow F, the ball 4, pushedby the spring 5 'againshthe top of the thread of the'spindle 2,tends tobe jammed between the wall of its seat 3 and the top of the thread. Inorder to release the nut, it is suflicient to push the ball 4 backtowards the bottom'of its seat. Such movement of the ball is effected bymeans of the longitudinal displacement of the push bar 6. The latter,the shape of which is indicated in Figs. 4 and. 5, is provided with avertical rod 7 which projects out of the nut 1. When the push bar 6 ispushed back in theinside of the channel'3, the rod-7 slides freelyv in agroove provided on the nut .in a parallel direction to the channel. 3.Towards the endiof this groove 8 on the side of the axis of the nut, asecond groove 9 ends, the axis of which is'per pendicular or obliquerelatively to that of the groove 8 and the walls of which are slightlyinclined, as-

shown in Figs. 6 and 7.

In order to unlock the nut push bar 6 is moved inwardly by pressure onrod 6 with the hand or asuitable tool until said rod comes oppositegroove 9, .whereupon the push bar is rotated slightly to bring the rodinto this groove, which looks the push bar against outward movement. Thepush bar in moving to this position disengages ball 4 from the threadsof bolt 2. It willbe observed from Figs. 1, 4 and 5 that push bar 6 isformed with a slot in its inner side which permits the bar to be pushedinwardly over the thread on bolt 2.

In order to lock the nut, the rod 7 is drawn out of the groove 9 bymeans of the tool; as soon as the rod 7 is thrust'in the groove'8, itmay be left and the spring 5 pushes then back the push bar 6 by means ofthe ball 4.

In order to prevent the push bar 6 from leaving the channel 3, alockingstop or any suitablevdevice is engaged in an opening 11, the axis ofwhich is perpendicular to that of the channel 3 and the depth of whichis lower than the length of the stop 10, so that the end of the latterprojects behind the push bar 6 which buffers against it.

The stop 10 and the opening 11 ma be also replaced by a clenching ofmetal w ich will be obtained by means of a bodkin and which will partlyclose the section of the channel 3.

The dismounting and the replacement of the unlocking members are veryeasy because it is sufiicient to remove the stop 10 or to make the-metalclenching fall for being able to remove the push bar 6, then the ball 4and the springfi. The presence of the unlocking device. does notincrease much the cost-price of the nut,

because itis suflicient to manufacture a pushbar of easy construction,then to mill, in the v nut. two grooves anda little recess.

Further, this device ensures an entire safetybecause,-when the rod 7 isengaged in the groove 8 or at the bottom "of. the

groove 9, it cannot come out either owing to the presence of stpp 10 orof the metal.

clenching, or owing to the antagonist action nut, the nut being formedwith a groove in of the spring 5. which said rod is adapted to slide andwith hat I claim is: a transverse recess communicating with the A nutlock comprising in combination a groove near the inner end thereof, said6 nut -l1aving a threaded opening and a chantransverse recess beingadapted to receive 1 nel tangential thereto, a ball and a. spring saidrod and hold it in unlocking position. in'said channel, the springtendin to hold In testimony whereof I hereunto afiix my the ball inlooking position, a pus bar resignature. ciprocable in the channel andprovided with m a lateral extending rod projecting out of the MAR-GELOUTHIER.

